Ionia Weather Forecast

    • 47
    • 67

    Increasing Clouds

    • 38
    • 58

    Partly Sunny

    • 39
    • 59

    Mostly Sunny

    • 48
    • 68

    Partly Sunny

    • 45
    • 65

    Partly Sunny

    • 43
    • 65

    Partly Sunny

Today 4 Oct Ontario

Mostly sunny. Highs Ranging from the lower 60s on the Hilltops to the upper 60s across the lower Elevations. South Winds 5 to 10 Mph.

Tonight 4 Oct Ontario

Partly cloudy. Lows in the upper 40s. Light Winds, becoming west 5 to 10 Mph.

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Ionia Temperature Statistics

October Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 1 October, 2026

    61 °F

  • Average October

    68.1 °F

  • Highest 1 October, 2026

    75.9 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.5 °F
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